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Physics

Physics
How much mechanical work must be done to completely melt 1 gram of ice at 0°C ?

336 J
80 J
2268 J
4.2 J

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Physics
The angle in which a cricket ball should be hit to travel maximum horizontal distance is :

45° with horizontal
60° with horizontal
30° with horizontal
15° with horizontal

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Physics
The ''four stroke petrol engine' is based on

Diesel-cycle
Carnot-cycle
Boyle's-cycle
Otto-cycle

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Physics
When a steel ball is placed on the surface of mercury, it does not sink because

Mercury is a semisolid
Of the surface tension of mercury
The density of mercury is greater than that of steel
Of the high viscosity of mercury

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Physics
Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is :

1
2
1.2
1.5

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Physics
In a freezer ice cubes will be formed more quickly in trays made of

Plastic
Wood
Aluminium
Rubber

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